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eliminate the SCCPSolver::getValueMapping method.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@85778 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner 2009-11-02 02:54:24 +00:00
parent 301a2792be
commit 8db50122a4
1 changed files with 23 additions and 25 deletions
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30
lib/Transforms/Scalar/SCCP.cpp
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@ -236,10 +236,10 @@ public:
return BBExecutable.count(BB);
}
/// getValueMapping - Once we have solved for constants, return the mapping of
/// LLVM values to LatticeVals.
std::map<Value*, LatticeVal> &getValueMapping() {
return ValueState;
LatticeVal getLatticeValueFor(Value *V) const {
std::map<Value*, LatticeVal>::const_iterator I = ValueState.find(V);
assert(I != ValueState.end() && "V is not in valuemap!");
return I->second;
}
/// getTrackedRetVals - Get the inferred return value map.
@ -1612,8 +1612,6 @@ bool SCCP::runOnFunction(Function &F) {
// If we decided that there are basic blocks that are dead in this function,
// delete their contents now. Note that we cannot actually delete the blocks,
// as we cannot modify the CFG of the function.
//
std::map<Value*, LatticeVal> &Values = Solver.getValueMapping();
for (Function::iterator BB = F.begin(), E = F.end(); BB != E; ++BB) {
if (!Solver.isBlockExecutable(BB)) {
@ -1630,8 +1628,8 @@ bool SCCP::runOnFunction(Function &F) {
if (Inst->getType()->isVoidTy() || isa<TerminatorInst>(Inst))
continue;
LatticeVal &IV = Values[Inst];
if (!IV.isConstant() && !IV.isUndefined())
LatticeVal IV = Solver.getLatticeValueFor(Inst);
if (IV.isOverdefined())
continue;
Constant *Const = IV.isConstant()
@ -1743,14 +1741,15 @@ bool IPSCCP::runOnModule(Module &M) {
// constants if we have found them to be of constant values.
//
SmallVector<BasicBlock*, 512> BlocksToErase;
std::map<Value*, LatticeVal> &Values = Solver.getValueMapping();
for (Module::iterator F = M.begin(), E = M.end(); F != E; ++F) {
for (Function::arg_iterator AI = F->arg_begin(), E = F->arg_end();
AI != E; ++AI)
if (!AI->use_empty()) {
LatticeVal &IV = Values[AI];
if (IV.isConstant() || IV.isUndefined()) {
AI != E; ++AI) {
if (AI->use_empty()) continue;
LatticeVal IV = Solver.getLatticeValueFor(AI);
if (IV.isOverdefined()) continue;
Constant *CST = IV.isConstant() ?
IV.getConstant() : UndefValue::get(AI->getType());
DEBUG(errs() << "*** Arg " << *AI << " = " << *CST <<"\n");
@ -1760,7 +1759,6 @@ bool IPSCCP::runOnModule(Module &M) {
AI->replaceAllUsesWith(CST);
++IPNumArgsElimed;
}
}
for (Function::iterator BB = F->begin(), E = F->end(); BB != E; ++BB) {
if (!Solver.isBlockExecutable(BB)) {
@ -1789,8 +1787,8 @@ bool IPSCCP::runOnModule(Module &M) {
if (Inst->getType()->isVoidTy())
continue;
LatticeVal &IV = Values[Inst];
if (!IV.isConstant() && !IV.isUndefined())
LatticeVal IV = Solver.getLatticeValueFor(Inst);
if (IV.isOverdefined())
continue;
Constant *Const = IV.isConstant()